Rentfrow, Peter J., John T. Jost, Samuel D. Gosling, and Jeffrey Potter. "Statewide Differences in Personality Predict Voting Patterns in 1996–2004 U.S. Presidential Elections." Social and Psychological Bases of Ideology and System Justification. : Oxford University Press, 2009-08-01. Oxford Scholarship Online. 2009-05-01. Date Accessed 26 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195320916.001.0001/acprof-9780195320916-chapter-13>.
Rentfrow, P., Jost, J., Gosling, S., & Potter, J.(2009-08-01). Statewide Differences in Personality Predict Voting Patterns in 1996–2004 U.S. Presidential Elections. In Social and Psychological Bases of Ideology and System Justification. : Oxford University Press. Retrieved 26 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195320916.001.0001/acprof-9780195320916-chapter-13.
Rentfrow, Peter J., John T. Jost, Samuel D. Gosling, and Jeffrey Potter. "Statewide Differences in Personality Predict Voting Patterns in 1996–2004 U.S. Presidential Elections." In Social and Psychological Bases of Ideology and System Justification. : Oxford University Press, 2009-08-01. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195320916.001.0001/acprof-9780195320916-chapter-13.
Rentfrow PJ, Jost JT, Gosling SD, Potter J. Statewide Differences in Personality Predict Voting Patterns in 1996–2004 U.S. Presidential Elections. In: Jost JT, Kay AC, Thorisdottir H. Social and Psychological Bases of Ideology and System Justification. Oxford University Press; 2009. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195320916.001.0001/acprof-9780195320916-chapter-13. Accessed May 26, 2013.